Description: Prerequi- site(s): BIOL 002; or both BIOL 005A and BIOL 05LA; both CHEM 001C and CHEM 01LC (or both CHEM 01HC and CHEM 1HLC); ENSC 100; or consent of instructor. Examination of soil biota and their relationships with plants and the soil environment. Emphasizes soil biotic interactions that influence soil fertility, plant disease, and plant growth. Examines the importance of the different microbial and faunal groups from the rhizosphere to the ecosystem level. Cross-listed with ENSC 120. De Ley